Skip to content

spring 事务 PROPAGATION_NESTED纠错 #1611

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Snailclimb merged 2 commits into from
Mar 13, 2022
Merged

spring 事务 PROPAGATION_NESTED纠错 #1611

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5a44269
spring 事务 PROPAGATION_NESTED纠错
1autodidact Mar 10, 2022
3ac727a
Update spring-transaction.md
1autodidact Mar 10, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 4 additions & 10 deletions docs/system-design/framework/spring/spring-transaction.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -393,14 +393,13 @@ Class B {

**3.`TransactionDefinition.PROPAGATION_NESTED`**:

如果当前存在事务，则创建一个事务作为当前事务的嵌套事务来运行；如果当前没有事务，则该取值等价于`TransactionDefinition.PROPAGATION_REQUIRED`。也就是说：

1. 在外部方法未开启事务的情况下`Propagation.NESTED`和`Propagation.REQUIRED`作用相同，修饰的内部方法都会新开启自己的事务，且开启的事务相互独立，互不干扰。
2. 如果外部方法开启事务的话，`Propagation.NESTED`修饰的内部方法属于外部事务的子事务，外部主事务回滚的话，子事务也会回滚，而内部子事务可以单独回滚而不影响外部主事务和其他子事务。
如果当前存在事务，就在嵌套事务内执行；如果当前没有事务，就执行与`TransactionDefinition.PROPAGATION_REQUIRED`类似的操作。也就是说：

1. 在外部方法开启事务的情况下,在内部开启一个新的事务，作为嵌套事务存在。
2. 如果外部方法无事务，则单独开启一个事务与 PROPAGATION_REQUIRED 类似
这里还是简单举个例子：

如果 `aMethod()` 回滚的话，`bMethod()`和`bMethod2()`都要回滚，而`bMethod()`回滚的话，并不会造成 `aMethod()` 和`bMethod()2`回滚。
如果 `bMethod()` 回滚的话，`aMethod()`也会回滚。

```java
Class A {
Expand All @@ -409,7 +408,6 @@ Class A {
//do something
B b = new B();
b.bMethod();
b.bMethod2();
}
}

Expand All @@ -418,10 +416,6 @@ Class B {
public void bMethod {
//do something
}
@Transactional(propagation=propagation.PROPAGATION_NESTED)
public void bMethod2 {
//do something
}
}
```

Expand Down